Garmin GI 275 Installation Manual page 375

NOTES
FLIGHT DIRECTOR WIRING TO EXISTING ADI MUST BE DISCONNECTED IF THIS INDICATOR IS USED AS A
STANDBY INSTRUMENT FOR THE GI 275. THIS ADI MUST BE LOCATED IN ACCORDANCE WITH SECTION 3.2.
IF THIS INDICATOR IS BEING RELOCATED TO THE CO-PILOT'S SIDE, WIRING MAY BE CONNECTED IN
1
PARALLEL TO THIS ADI AND MUST BE CONNECTED IN ACCORDANCE WITH THE MANUFACTURER'S
INSTRUCTIONS.
IF THE FLIGHT DIRECTOR IS BEING DISPLAYED ON THE CO-PILOT'S ADI, THIS FLIGHT DIRECTOR
ALIGNMENT MUST BE CORRECTLY ADJUSTED IN ACCORDANCE WITH THE MANUFACTURER'S
2
INSTRUCTIONS PRIOR TO MAKING ANY ADJUSTMENTS TO THE GI 275.
ADDITIONAL DROP DOWN RESISTORS MAY BE REQUIRED TO ENSURE THAT THE HEADING AND COURSE
ERROR SIGNALS TO THE 5536E( ) COMPUTER-AMPLIFIER ARE WITHIN THE CORRECT OPERATING RANGE.
3
REFER TO BENDIX "I.B. 2004 PART 1 INSTALLATION MANUAL M-4C AFCS PARAGRAPH 2-5
"TROUBLESHOOTING PROCEDURES FOR PREFLIGHT CHECKOUT."
THE AUTOPILOT COMPUTER MUST BE CONFIGURED FOR A COLLINS PN-101 (FD-112C/V) HSI IN ORDER TO
HAVE THE CORRECT HEADING AND COURSE ERROR (DATUM) SIGNALS; OTHERWISE, ADDITIONAL
ADJUSTMENTS WILL BE REQUIRED. REFER TO BENDIX "I.B. 20004 M-4D AFCS INSTALLATION MANUAL"
4
SECTION II PARAGRAPH 7 "FLIGHT CHECK AND CALIBRATION" FOR ADJUSTMENTS THAT CAN BE MADE IN
THE 5487G OR 5485A FLIGHT CONTROLLER. REFER TO I.B. 20004 PARAGRAPH 5 "POST-INSTALLATION
CHECK OUT." FOR ADDITIONAL INFORMATION.
USE TRIAD TRANSFORMER P/N TY-141P OR EQUIVALENT. IN SOME INSTALLATIONS, EXISTING
5
TRANSFORMERS (COLLINS P/N 677-9020-00) MAY BE USED.
IT IS NECESSARY TO INSTALL A RELAY TO INVERT THE POLARITY OF THE "ILS/GPS APPROACH" SIGNAL
6
FROM ACTIVE-LOW TO ACTIVE-HIGH FOR INPUT INTO THE 5536E/F COMPUTER AMPLIFIER.
THE 115VAC 400 Hz EXCITATION FOR THE AUTOPILOT (P2-40) AND THE 26VAC 400 Hz REFERENCE
VOLTAGE FOR THE GI 275 (P2752-65), MUST BE IN PHASE WITH EACH OTHER FOR PROPER FEEDBACK
7
OF THE HEADING AND COURSE ERRORS TO THE AUTOPILOT COMPUTER.
ORIGINAL SWITCH AND WIRING MUST BE RETAINED.
8
CONNECTIONS MUST BE MADE TO THE PILOT'S PRIMARY ADI ONLY.
9
Figure B-12 Autopilot/Flight Director Interconnect - Bendix
190-02246-10
Rev. 11
Sheet 2 of 2
GI 275 Part 23 AML STC Installation Manual
Page B-30